The 30-year-old celebutante, who is currently eight months pregnant, walked the red carpet in heels at the event but later regretted her choice of footwear: “Today I vowed that I was going to wear flats, and then at the last second, I threw on some heels,” she told ET, referring to the pink pumps. “I can’t wait to sit down already. It’s hard carrying the extra weight. I’m over the red carpet being pregnant.”

Kourtney’s stepdad, Bruce Jenner, has warned her that the hardest part is yet to come: “I have great confidence she will get through this – that baby will be born. But then the real tough stuff starts for her,” says Bruce, adding, “You’ve got a little baby there for 24 hours a day, for the next 20 years!”

Kourtney and boyfriend Scott Disick are expecting their baby boy at the end of this year.